gnu.offbyone.lan is a LAIR pod X network resource, an attempt to replace the flakey wildebeast.

• 02/05/2010 - gnu.offbyone.lan created.
• 02/07/2010 - wildebai, antelope, and wildgoat created (duplicates of gnu)
• 02/11/2011 - gnu.offbyone.lan recreating running Debian squeeze.
• 02/19/2011 - all wildebeest herd are now squeeze-based VMs (duplicates of gnu)

• Lots to do
• finish setting up X config (Xresources)
• connect with Xnest
• set up user menu

The following packages have been installed on gnu:

• lair-std lair-vm lair-nfs lair-ldap lair-autofs lair-mail lair-backup
• xpdf xterm rxvt-unicode build-essential dump fluxbox iceweasel imagemagick
• oneko xbase-clients lyx openoffice.org-calc openoffice.org-writer
• xdm xfonts-utils xfonts-scalable xfonts-encodings xfonts-75dpi xfonts-100dpi
• xautomation xpaint xscreensaver xwit x11vnc tightvncserver a2ps gs mpage
• recode enscript xvnc4viewer openoffice.org-writer2latex chromium-browser

gnu is a Xen virtual machine. Pertinent configuration information follows:

gnu.offbyone.lan recreated on sokraits on 02/11/2011:

sokraits:~$ sudo xen-create-image --hostname=gnu --mac 00:16:3E:2E:d0:20 --role=udev

The Xen config file for this VM is as follows:

gnu.cfg

##########################################################################
# LAIR Xen VM configuration file (gnu.offbyone.lan)
##########################################################################
 
#################################################
#  Kernel + memory size
#
bootloader  = '/usr/lib/xen-default/bin/pygrub'
vcpus       = '2'
memory      = '512'
 
#################################################
#  Disk device(s).
#
root        = '/dev/xvda1 ro'
disk        = [ 'file:/xen/images/gnu.disk,xvda1,w',
                'file:/xen/images/gnu.swap,xvda2,w'  ]
 
#################################################
#  Hostname
#
name        = 'gnu'
 
#################################################
#  Networking
#
dhcp        = 'dhcp'
vif         = [ 'mac=00:16:3E:2E:d0:20' ]
 
#################################################
#  Behaviour
#
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'

In /root/initrd, it looks like we have to make the following change:

server=10.80.2.3           # nfs serves the client image via nfs

As it was set to wildebeast— so after all that effort, the initrd the clients pulled down pointed them back at wildebeast.

Run /root/doinitrd.sh

This will recreate it, and copy it into /export/tftpboot, allowing for clients to utilize it.

In /export/client/etc/rc.local on gnu, there's a line nearly at the end of this file that needs to be changed:

FLAKEID="`ifconfig eth0|grep 'inet addr'|cut -d':' -f2|cut -d' ' -f1|cut -d'.' -f4`"
XHOSTID="`echo $(($FLAKEID % 4))`"

if [ "$XHOSTID" -eq 0 ]; then
    XRESHOST="wildebai"
elif [ "$XHOSTID" -eq 1 ]; then
    XRESHOST="antelope"
elif [ "$XHOSTID" -eq 2 ]; then
    XRESHOST="gnu"
else
    XRESHOST="wildgoat"
fi

X -ac -query ${XRESHOST}.offbyone.lan :0 vt7 &

As it was set to wildebeast.

All these are in /etc/X11/xdm/ on gnu..

In /etc/X11/xdm/xdm-config, the very last line in the file needs to be commented out (! is the comment character here), so:

DisplayManager.requestPort:    0

Needs to become:

!DisplayManager.requestPort:    0

In /etc/X11/xdm/Xaccess, have a line to uncomment:

*                   #any host can get a login window

In /etc/X11/xdm/Xservers, we need to comment out everything… in our setup, we don't run an X server locally (on gnu), the clients run their own X servers (ie on the flakes), so this file is empty.

In /etc/X11/xdm/Xsetup, establishing some polish (background and power saving):

xset +dpms dpms 600 0 0
#xsetroot -solid rgb:8/8/8
xsetroot -solid black

The file /etc/X11/xdm/Xresources is where the bulk of the xdm appearance customization takes place.

Here it is (obviously subject to change as new tweaks make their way into it):

xlogin*login.translations: #override \
    Ctrl<Key>R: abort-display()\n\
    <Key>F1: set-session-argument(failsafe) finish-field()\n\
    <Key>Delete: delete-character()\n\
    <Key>Left: move-backward-character()\n\
    <Key>Right: move-forward-character()\n\
    <Key>Home: move-to-begining()\n\
    <Key>End: move-to-end()\n\
    Ctrl<Key>KP_Enter: set-session-argument(failsafe) finish-field()\n\
    <Key>KP_Enter: set-session-argument() finish-field()\n\
    Ctrl<Key>Return: set-session-argument(failsafe) finish-field()\n\
    <Key>Return: set-session-argument() finish-field()

xlogin*greeting: Classroom Linux Terminal (CLIENTHOST)
xlogin*namePrompt: Lab46 Login:\040

xlogin*fail: Login incorrect (Please use your Lab46 login)

#if WIDTH >= 1024
xlogin*greetFont: -adobe-helvetica-bold-o-normal--25-180-100-100-p-138-iso8859-1
xlogin*font: -adobe-helvetica-medium-r-normal--20-140-100-100-p-100-iso8859-1
xlogin*promptFont: -adobe-helvetica-bold-r-normal--20-140-100-100-p-105-iso8859-1
login*failFont: -adobe-helvetica-bold-r-normal--20-140-100-100-p-105-iso8859-1
#if PLANES >= 8
xlogin*logoFileName: /usr/share/X11/xdm/pixmaps/lair.xpm
#else
xlogin*logoFileName: /usr/share/X11/xdm/pixmaps/debianbw.xpm
#endif
#else
xlogin*greetFont: -adobe-helvetica-bold-o-normal--14-140-75-75-p-82-iso8859-1
xlogin*font: -adobe-helvetica-medium-r-normal--12-120-75-75-p-67-iso8859-1
xlogin*promptFont: -adobe-helvetica-bold-r-normal--12-120-75-75-p-70-iso8859-1
xlogin*failFont: -adobe-helvetica-bold-r-normal--12-120-75-75-p-70-iso8859-1
#endif

#ifdef COLOR
xlogin*borderWidth: 1
xlogin*frameWidth: 5
xlogin*innerFramesWidth: 2
xlogin*shdColor: grey30
xlogin*hiColor: grey90
xlogin*background: grey
!xlogin*foreground: darkgreen
xlogin*greetColor: Blue3

xlogin*failColor: red
*Foreground: black
*Background: #fffff0
#else

xlogin*borderWidth: 3
xlogin*frameWidth: 0
xlogin*innerFramesWidth: 1
xlogin*shdColor: black
xlogin*hiColor: black
#endif

xlogin*useShape: true
xlogin*logoPadding: 10

XConsole.text.geometry: 480x130
XConsole.verbose:   true
XConsole*iconic:    true
XConsole*font:      fixed

Chooser*geometry:       700x500+300+200
Chooser*allowShellResize:   false
Chooser*viewport.forceBars: true
Chooser*label.font:     *-new century schoolbook-bold-i-normal-*-240-*
Chooser*label.label:        XDMCP Host Menu from CLIENTHOST
Chooser*list.font:      -*-*-medium-r-normal-*-*-230-*-*-c-*-iso8859-1
Chooser*Command.font:       *-new century schoolbook-bold-r-normal-*-180-*

Note the existence of the lair.xpm file in /usr/share/X11/xdm/pixmaps, this needs to be put there (as I originally put it there on wildebeast).

gnu:~$ wget http://pdq.sourceforge.net/ftp/pdq-2.2.1.tgz
...
gnu:~$ tar -zxf pdq-2.2.1.tgz
gnu:~$ cd pdq-2.2.1
gnu:~/pdq-2.2.1$ ./configure
...
checking for glib-config... /usr/bin/glib-config
checking for GLIB - version >= 1.2.0... yes
checking for gtk-config... /usr/bin/gtk-config
checking for GTK - version >= 1.2.0... yes
updating cache ./config.cache
creating ./config.status
creating Makefile
creating src/Makefile
creating lpd/Makefile
creating doc/Makefile
creating doc/pdq.1
creating doc/printrc.5
creating doc/xpdq.1
creating etc/Makefile
creating etc/printrc.example

   Setting pdq resource directory to /etc/pdq
   Setting global pdq configuration file to /etc/pdq/printrc

   Now do 
      % make 
      # make install
      # cp /etc/pdq/printrc.example /etc/pdq/printrc


gnu:~/pdq-2.2.1$ make
...
gnu:~/pdq-2.2.1$ sudo make install
...
gnu:~/pdq-2.2.1$ 

• XDM Xterm Mini-HOWTO